MSI H55M-E33 - Manual (Page 37)

Hardware Setup
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MS-7636
2-21
Hardware Setup
▍
MS-7636
Led S
tatuS
i
ndicatorS
APS LED
The APS (Actve Phase Swtchng) LED ndcate the current CPU power phase mode.
Follow the nstructons below to read.
: ON, : OFF
The LED wll lght when CPU s n 2 or 3 phase power mode.
The LED wll turn off when CPU s n 1 phase power mode.
APS LED